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authorAl Cooper <alcooperx@gmail.com>2020-07-22 20:07:44 +0300
committerFelipe Balbi <balbi@kernel.org>2020-07-24 16:45:14 +0300
commitb10d33c4f068ebb70a607d644b7ace259127aa18 (patch)
treedc3bfd123091866c52d84d0730251088061f8528 /drivers/usb
parent33d1c71832b7b7e56ca82b2f19c5df31297657e6 (diff)
downloadlinux-b10d33c4f068ebb70a607d644b7ace259127aa18.tar.xz
usb: bdc: driver runs out of buffer descriptors on large ADB transfers
Version v1.0.40 of the Android host ADB software increased maximum transfer sizes from 256K to 1M. Since the STB ADB gadget driver requests only 16K at a time, the BDC driver ran out of buffer descriptors (BDs) if the queuing happens faster than the incoming 16K transfers. This issue is fixed by doubling the number of BDs that can be queued so that the entire 1M request can be queued without running out of buffers. Signed-off-by: Al Cooper <alcooperx@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/udc/bdc/bdc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/gadget/udc/bdc/bdc.h b/drivers/usb/gadget/udc/bdc/bdc.h
index 6e1e881dc51e..ac75e25c3b6a 100644
--- a/drivers/usb/gadget/udc/bdc/bdc.h
+++ b/drivers/usb/gadget/udc/bdc/bdc.h
@@ -44,7 +44,7 @@
#define NUM_SR_ENTRIES 64
/* Num of bds per table */
-#define NUM_BDS_PER_TABLE 32
+#define NUM_BDS_PER_TABLE 64
/* Num of tables in bd list for control,bulk and Int ep */
#define NUM_TABLES 2